Leslie HL-722 - Rotary preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The HL-722 is a solid-state Leslie rotary speaker cabinet for organs and keyboards. Its electronics split the signal through a crossover into separate horn and drum amplifiers for the rotating sound, plus stationary keyboard and pedal amplifiers, with motor control for the rotor speeds. The same electronics also served related cabinets in the family.

Tags: american, solid-state, vibrato, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.